Lawang Sewu is a building in Semarang, Central Java, which is the office of the Nederlands-Indische Maatschappij Spoorweg or NIS. Built in 1904 and completed in 1907. Located at the roundabout Tugu Muda formerly called Wilhelmina Plein.

Local communities called Lawang Sewu (Thousand Door). This is because the building has a lot of doors (in fact the door was not until a thousand, maybe also because the window of the building height and width, the public also regard it as the door).

Ancient buildings and magnificent two-story after independence is used as a Railway Division office of Indonesia (DKARI) or the current PT Kereta Api Indonesia. Also been used as an Infrastructure Agency Regional Military Command (Kodam IV / Diponegoro) and the Regional Office (Regional Office) Department of Transportation Central Java. During the struggle this building has its own historical record of events during a five-day battle in Semarang (14 October to 19 October 1945) in this old building into a great location of the battle between youth Youth AMKA or against Railway Kempetai and Kidobutai, Japan. Thus Semarang City Government Mayor and SK 650/50/1992, Lawang Sewu included as one of 102 ancient or historic buildings in the city of Semarang is worth being protected.

Currently building a 181-year-old was empty and the infamous haunted buildings and spooky. Occasionally used as a place of exhibition, including Semarang Expo.Pernah Tourism Expo and there is also a discourse that wants to turn it into a hotel. In the year 2007, this building was also used for the film with the same title with the building.